Laser sensor system scans railway tracks
August 18, 2014 // Christoph Hammerschmidt
To keep the track infrastructure safe, railway operators need to acquire many track parameters in regular intervals. Irregularities in the rail geometry can cause sudden cracks in the steel rails since these are under high tensions. These cracks in turn can initiate domino effects with rails and railway sleepers tearing over large stretches. An innovative optical sensor system surveys the tracks quickly and safely. A laser scanner acquires geometrical irregularities and transforms them into 3D images.
Today the state of the art in surveying a railway track infrastructure is camera-based systems. These systems however have a number of drawbacks: The quality of the results heavily depends on the lighting conditions, and they require a rather complex processing of image data. In addition, the image data are demanding a very large memory space.
In its Rail Track Scanner (RTS), Fraunhofer IPM for the first time utilises a laser scanner to measure rails, railheads, sleepers and rail bed. The specific optical design allows the scanner to be mounted just 1.2 meters above the rail bed. The device scans the tracks transversely to the measurement vehicle movement at a track width of some 1.7 metres. With up to 2 million single measurements per second, the instrument generates up to 800 profiles, providing a detailed three-dimensional image of the tracks and the infrastructure that is associated directly to it. Out of the cluster of points generated, appropriate algorithms extract parameters such as distance, height and tilt of the rails as well as the exact geometry of the railheads. These parameters then are compared with set values. The scan frequency can be adapted to the respective task. Topographic structures and deviations are identified at an exactness of less than 1 mm.
The scanner has the size of a shoebox and thus can be mounted to any rail vehicle. Thus, the RTS offers a cost-effective option to automatically survey the rail infrastructure without the need to acquire a specific measurement vehicle. Utilising an eye-safe infrared laser (class I), the scanner can be deployed in the public space without any restrictions. The instrument, which will be introduced to the public at the Innotrans trade fair in September, will be utilised by Swiss mobile mapping services company iNovitas to survey narrow-gauge lines in Switzerland.All news
Porsche rainmaker advocates platooning
February 26, 2015
Individual mobility as our fathers knew it gets increasingly challenged. Traffic density, pollutant emissions and other ecologic ...
Radar-based sensor network helps drivers finding a parking spot
Xilinx flexes its muscles in the ADAS arena
The future of custom ASICs
Dual nanowire structure absorbs light efficiently
5 trends to watch at Mobile World Congress
February 26, 2015
Anything and everything in the world that demands wireless connectivity — cars, phones, homes, retail transactions, factories, ...
Infineon: CAN FD success goes at the expense of FlexRay
Who will partner LG to stimulate OLED TV sector?
Printed NFC tags detect opened goods
- Software-Defined Radio Handbook
- A Four-Quadrant DC/DC Switching Regulator Smoothly Transitions from Positive to Negative Output Voltages for FPGA and Other Applications
- LED Driver with Integrated Spread Spectrum Reduces EMI without Adding Flicker
- Accelerate SDN and NFV with Off-the-Shelf Software
InterviewInfineon: CAN FD success goes at the expense of FlexRay
The faster version of the venerable CAN bus, CAN FD is currently taking off at several carmakers. Infineon's Thomas Böhm, Head of Body / Automotive, believes this could well go at the expense of FlexRay. ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
To ensure you have a good start in 2015, Freescale is giving away five of its QorIQ TWR-LS1021A Tower system modules, worth USD269 each, for EETimes Europe's readers to win.
The module is the most feature-rich and high-performance Tower system offered by Freescale, enabling compatibility and interoperability with the growing list of Tower expansion modules, offering an easily accessible...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.